CUSHION, PREM W/C MOLDED GEL 18X16X3 (4/CS) McKesson Premium Gel Seat Cushion with Molded Foam Helps in prevention, treatment and management of pressure sores with enhanced pressure redistribution Premium, 3-inch design includes a pressure-sensitive, molded high density polyurethane foam encompassing a gel bladder and topped with a gel-infused, visco memory foam layer Low-shear, stretch nylon cover allows air to pass, but resists fluids for lasting breathability, comfort and durability Low-maintenance, waterproof material accommodates risks of spill, perspiration and incontinence; unzips for convenient machine washing Specifically designed to optimize pressure relief and shock absorbency by allowing user's pressure points to "immerse" into the gel-infused, visco-foam top layer Open-cell, visco memory foam for breathability while gel acts as cooling agent for temperature control and mitigating perspiration Trochanter cutouts facilitate proper pressure redistribution promoting stable pelvic support and posture Molded leg troughs promote thigh alignment and postural symmetry Raised front ridge to promote proper positioning and control sliding Designed to absorb shock and provide pressure relief for users up to 275 lbs. Adjustable straps buckle to secure appropriate position and safety Not Made with Natural Rubber Latex Packaged: 1 Cushion Per Box, 4 Boxes Per Case